Trac supports modifying a batch of tickets in one request from custom query results.

To perform a batch modification, select the tickets you wish to modify and set the new field values using the section underneath the query results.

List fields

The Keywords and Cc fields are treated as lists, where list items can be added and/or removed in addition of replacing the entire list value. All list field controls accept multiple items, such as multiple keywords or cc addresses.

Excluded fields

Multi-line text fields are not supported, because no valid use-case has been presented for syncing them across several tickets. That restriction applies to the Description field as well as to any custom field of type 'textarea'. However, future versions of Trac could support in conjunction with more suitable actions like 'prepend', 'append' or 'search & replace' (​th:#2415).